Multiple choice Which of the following is used in air conditioning applications? Chlorobenzene 2-Chlorobenzoic acid Chlorodifluoromethane Vinyl chloride Reveal answer Fill a bubble to check yourself C Correct answer Explanation Chlorodifluoromethane is a hydrochlorofluorocarbon (HCFC). It is commonly used as a propellant and in air conditioning applications. It is a versatile intermediate in industrial organofluorine chemistry, e.g. as a precursor to tetrafluoroethylene.